Swanson Lab

A female lab member works on piping samples while Dr. Swanson looks on

Our Research

The Swanson lab studies the regulation of RNA processing during mammalian development and aging and how this regulation is altered in disease. Our research focuses on three main areas: 1) the roles of genomic repetitive elements in embryonic and postnatal development; 2) novel pathomechanisms of neurological diseases caused by the expansion of short tandem repeats (STRs); 3) RNA-based mechanisms of enhanced tissue repair in a mammalian model of optimized regeneration.      

Focus Areas

  • RNA processing
  • RNA binding protein (RBP) and ribonucleoprotein (RNP) complex functions
  • Myotonic dystrophy types 1 (DM1) and 2 (DM2)
  • Amyotrophic lateral sclerosis and frontotemporal dementia (ALS/FTD) 
  • Mammalian tissue regeneration

Join Our Lab

We are always looking for talented Postdocs to join our team. Please contact Dr. Swanson to see if positions are available.

Benjamin kidd reviews scans on a computer in the lab

Research Details

Microsatellites, Non-Coding RNAs and RNA-Mediated Disease

The human genome contains a complex array of repetitive DNA sequence elements including transposon-derived/interspersed repeats, segmental duplications, large tandemly repeated sequences and simple sequence repeats (microsatellites). Microsatellite instability is associated with nearly 30 hereditary disorders. Disease may result from repeat expansions within a coding region and synthesis of a toxic protein (e.g., Huntington disease). Alternatively, many microsatellites are located in non-coding regions and cause diseases such as spinocerebellar ataxia types 8, 10 and 12 (SCA8, SCA10, SCA12), fragile X-associated tremor ataxia syndrome (FXTAS) and several types of myotonic dystrophy (CDM, DM1, DM2). How do simple repeat expansions in non-coding regions result in disease? To answer this question, we have focused on myotonic dystrophy because it is a dominantly-inherited disorder associated with non-coding CTG and CCTG expansion mutations in two different genes, DMPK (DM1) and CNBP (DM2), which lead to similar disease phenotypes. We proposed the RNA-mediated disease model in which mutant DM1 and DM2 mRNAs are trapped in the nucleus and sequester (C)CUG repeat expansion binding proteins that are essential for normal tissue development and maintenance. Our lab identified these sequestered factors as the muscleblind-like (MBNL) proteins. Ongoing efforts are focused on elucidating the normal functions of these proteins as well as investigating whether RNA toxicity has a pathogenic role in other hereditary disorders.

 Regulation of RNA Processing During Development

During embryogenesis and postnatal development, mammalian tissues are initially formed and subsequently remodeled to meet the evolving demands of the developing organism. This process requires a dynamic series of biochemical events at both the transcriptional and post-transcriptional levels. While considerable effort has been spent on clarifying DNA sequence elements and trans-acting factors involved in transcriptional regulation, less is known about the post-transcriptional steps required for normal tissue genesis and maturation. Many genes encode multiple protein isoforms that are generated by alterative splicing of pre-mRNAs and we are interested in understanding the mechanistic basis for these splicing transitions during skeletal muscle and brain development. Recent studies have focused on the roles of two families of alternative splicing factors, the MBNL and CELF proteins, in regulating alternative splicing site selection. We are currently investigating additional factors and pathways that impact RNA processing during development and how disruption of these pathways results in disease.

 Co/Post-Transcriptional Gene Regulation and Neurological Disease

The human brain contains ~1011 neurons which are interconnected through a vast network of synapses. This highly interactive cell system requires an extraordinary level of protein diversity, much of which is generated by alternative processing of gene transcripts. The brain is severely affected by the multi-systemic disorder myotonic dystrophy (DM). These CNS effects can be subdivided into developmental (DM type 1 disease only) and degenerative changes (DM1 and DM2). This distinction between DM1 and DM2 in the CNS is strikingly similar to disease-associated effects observed in muscle where developmental abnormalities (e.g., hypotonia, respiratory insufficiency) are only observed in DM1 (congenital DM or CDM) while adult-onset degenerative changes (muscle weakness/wasting) occur in both DM1 and DM2. Our long-term goal is to test the hypothesis that DM-associated CNS deficits result from disruption of the normal steps in the expression and pre-mRNA processing of specific gene transcripts and to clarify how the corresponding biochemical pathways are adversely affected in the DM brain.

Lab Members

Maurice S Swanson
Department: Molecular Genetics & Microbiology

Maurice S Swanson

Professor And Associate Program Director
Phone: (352) 273-8076
Name Title Department Business Phone Email
Jodi L Bubenik Jodi L Bubenik Assistant Scientist (faculty) Molecular Genetics & Microbiology (352) 273-8156 jbubenik@ufl.edu
Helmut A Carter Helmut A Carter Laboratory Technician Molecular Genetics & Microbiology (352) 273-8155 carter.h@ufl.edu
Mackenzie L Davenport Mackenzie L Davenport POSTDOC ASO Molecular Genetics & Microbiology (352) 273-8155 davenport.m@ufl.edu
Benjamin M Kidd Benjamin M Kidd GRADUATE AST-R Molecular Genetics & Microbiology (352) 273-8601 benjamin.kidd@ufl.edu
Curtis A Nutter Curtis A Nutter PostDoc Associate Molecular Genetics & Microbiology (352) 273-8156 curtis.nutter@gmail.com
Lukasz J Sznajder Lukasz J Sznajder Research Assistant Professor Molecular Genetics & Microbiology (352) 273-8183 ljsznajder@ufl.edu

Lab Volunteers

Name Title Phone Number EMail
Dana Tuyn Undergraduate Volunteer (352) 273-8156 dana.tuyn@ufl.edu
Nayha Kumbkarni Undergraduate Volunteer (352) 273-8156 nkumbkarni@ufl.edu